8. The Rods and Cones 5 million per eye (more L and M cones than S cones) 100 million per eye Responsible for daylight (photopic) vision Responsible for low- level (scotopic) vision Cone function Rod function scotopic mesopic photopic luminance Cones Rods
20. Colour Space - Delta E a* b* C* H* is the difference between two points in colour space, often use to determine a colour tolerance or specification. S C S H